Improved spring-hinge



intrd gatita stent @wird DAVID RENSHAW, OE BROOKLYN, NEW YORK, ASSIGNORKTO EDWARD P.

BRAY, OE ELIZABETH, NEW JERSEY.

Letters Patent No. 98,709, dated January 11, 1870; antedated January 8, 1870.

IMPROVED SPRING-HINGE.

The Schedule referred tp in these Letters Patent and making part of the same.

Specification of certain Improvements in Spring- Hinges invented by DAVID RnNsnAw, of Brooklyn, in the county of Kings, and State of New York.

.Nature and Objects of the Invention'.

This invention relates to a spring-hinge, having a recess formed in one" or both ends of the wings, for the reception of a coiled spring; and consists in the construction of the ratchet by which the ltension of the spring is adjusted, in its combination with other parts, and in certain improvements hereinafter described, which are connected therewith.'

Description of the Accompanying Drawings.

Figure 1 is a. side elevation of a hinge complete, which embodies my present improvements, in which drawing the hinge is represented as open, or the wings extended, and the springwound uptwonotches of the ratchet-wheel.

' Figure 2 is a plan ofthe same. Figure 3 is a transverse section, below the line X X of iig. 1.

Figure 4 is a detail v iew of the pawl or ratchet. Figure 5 is a vertical section of the same.

showing the parts General Description.

A A are the wings of the hinge, which are constructed with anotch or recess in the upper part, next the axis, for the reception of the spring and the enlarged portion ofthe centre-pin of the hinge.

B is the centre-pin of the hinge, on which the ratchet-wheel O is cast or otherwise secured in some suitable manner.

D is the `.spring of the hinge, the outer end of which spring is attachedto one of the Wings A, and the inner end to the centre-pin B.

E is the curved pawl or ratchet, by which the tension of the spring is adjusted and secured, a portion of which pawl is made to ,fit into triangular. or V- shaped recesses a' a, formed in the wings ofthe hinge, for its reception. i

These recesses are more clearly shown in iig. 1, in full lines in the left-handwing of the hinge, and in dotted lines ou the right-hand side, where the recess is covered by shoulders c e, or" the pawl E. This pawl is made, in the curved forni represented in figs.

3 and 4, the greatest portion ot' the inside thereof being so formed as to fit the contour ofthe periphery ofthe ratchet-wheel, as shown.

On the inner side of the curved pawl is a ribor projection, i, which extends nearly the whole length of the pawl, and ts into a depression, n, made to rcceive it, in the ratchet-wheel G.

The shoulders e e, of the pawl E, are made to project over the edges of the V-shapcd slots in the wings of the hinge, and when the pawl is in position for securing the tension of the spring, these shoulders abut or rest against one of the wings of the hinge, and thereby resist the reaction oi the spring.

This curved pawl is' also made thinner at the end farthest from the shoulders e e, to allow it to oe conveniently inserted into place, and manipulated in the operation of adjusting thc tension of the spring.

The centre-pin B is formed with a recess. to receive the spring, between the head or top I thereof, and

the ratchet-wheel O, and the head I `is'also provided with a hole or holes, c c, extending through it, for the insertion of a pin, to wind up' and adjust the spring.

In adjusting the tension of the spring after the hinge is placed upon the door, a pin is inserte-d in one of the holes c c, and the spring being drawn 'op to a triiie more than the proper tension, the ratchet or pawl E may then be slipped into place, and the end of the pa'wldroppcd into the proper notch of the ratchet-wheel.

The construction described not only secures the spring in adjustment, and prevents any reasonable possibility of the breaking or giving way ofV the ratchet, and makes it independent ofthe doubtful security ofi-a rivet, but it also prevents the possibility of thecentre-pin working .upward out of place, by means of the V-shaped portion of the outer side of the ratchet tting into a corresponding recess in the wings of the hinge, and the rib t', on the inner side oi' the said pawl, iitting into the groove n formed in the ratchet-wheel to receive it.

This construction may be somewhat varied, and yet accomplish the same purposes, and embody the same invention; as, for exainple,' holes instead of notches may be made in the ratchet-wheel, to receive the end ofthe pawl, formed like a pin to fit into them, or the ratchet-wheel may be made V-shaped, and iit into a corresponding groove in the pawl.

One ofthe wings ofthe hinge may also have an ornamental projection, in the line of the centre-pin, cast upon it, if desirable, as shown at the lower' end of the hinge, in tig. 1, so as to be au apparent cout-iuuation of the `centre-pin.

1 claim, as my inventionl. The combination of the ratchet-wheel G and the curved pawl E, fitting between said ratchet-wheel and one or both ot' the wings of the hinge, and abutting against one of them, substantially as `hereiubefore set forth.

2. The combination of the recesses a a, in one or both of the wings of the hinge, and the pawl E, so of the hinge, shall prevent the centre-pin from work- -constructed as to fit; into said recess or notch, and ing out 0f piace, substantially :is hereinbefore se's thereby secure the pawl from working out cf place, forth.

substantially as hereinbefore set forth. DAVID RENSHAV.

3. The cummuntion of the pawl E, ratchet-Wheel C, and the wings A. A, when the said parts are Witnesses:

so constructed that; lche uterpost-ion ofthe pawl E I. H. HOW,

between the centre-piu and one or .both of the Wings W. O. DONNELLY. 

